<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 警告框 -->
      <el-alert
      title="添加商品信息"
      type="info"
      center
      show-icon
      :closable="false">
    </el-alert>
    <!-- 步骤条 -->
    <el-steps :active="activeIndex - 0" finish-status="success" align-center>
      <el-step title="基本参数"></el-step>
      <el-step title="商品参数"></el-step>
      <el-step title="商品属性"></el-step>
      <el-step title="商品图片"></el-step>
      <el-step title="商品内容"></el-step>
      <el-step title="完成"></el-step>
    </el-steps>
    <!-- 标签页 -->
    <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" :label-position="'top'">
      <el-tabs v-model="activeIndex" :tab-position="tabPosition='left'" :before-leave='beforeTabLeave' @tab-click='tabClickd'>
        <el-tab-pane label="基本信息" name="0">
          <el-form-item label="商品名称" prop="goods_name">
            <el-input v-model="addForm.goods_name"></el-input>
          </el-form-item>
          <el-form-item label="商品价格" prop="goods_price" type='number'>
            <el-input v-model="addForm.goods_price"></el-input>
          </el-form-item>
          <el-form-item label="商品重量" prop="goods_weight" type='number'>
            <el-input v-model="addForm.goods_weight"></el-input>
          </el-form-item>
          <el-form-item label="商品数量" prop="goods_number" type='number'>
            <el-input v-model="addForm.goods_number"></el-input>
          </el-form-item>
          <el-form-item label="商品分类" prop="goods_cat">
            <el-cascader
            expand-trigger= 'hover'
            v-model="addForm.goods_cat"
            :options="catelist"
            :props="cateProps"
            @change="handleChange"></el-cascader>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品参数" name="1">
          <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
            <!-- 多选框 -->
            <el-checkbox-group v-model="item.attr_vals">
              <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border size='mini'></el-checkbox>
            </el-checkbox-group>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品属性" name="2">
          <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
            <el-input v-model="item.attr_vals"></el-input>
          </el-form-item>
        </el-tab-pane>
        <el-tab-pane label="商品图片" name="3">
          <el-upload
            :on-success="handleSuccess"
            :headers='headerObj'
            :action="uploadAPI"
            :on-preview="handlePreview"
            :on-remove="handleRemove"
            list-type="picture">
            <el-button size="small" type="primary">点击上传</el-button>
          </el-upload>
        </el-tab-pane>
        <el-tab-pane label="商品内容" name="4">
          <quill-editor v-model="addForm.goods_introduce"></quill-editor>
          <!-- 提交按钮 -->
          <el-button type="primary" class="Addbtn" @click="add">添加商品</el-button>
        </el-tab-pane>
      </el-tabs>
    </el-form>
    </el-card>
    <!-- 放大图片对话框 -->
    <el-dialog
    :visible.sync="preViewVisible"
    width="50%">
      <img :src="preview" class="preViewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  data () {
    return {
      activeIndex: 0,
      // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品分类
        goods_cat: [],
        // 图片地址
        pics: [],
        // 介绍
        goods_introduce: '',
        // 商品参数
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 获取的分类列表
      catelist: [],
      cateProps: {
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      // 获取的商品分类
      manyTableData: [],
      onlyTableData: [],
      // 图片地址API
      uploadAPI: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传的组件headers请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 图片地址
      preview: '',
      // 图片对话框
      preViewVisible: false
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败')
      }
      this.catelist = res.data
    },
    // 更改级联选择去所触发的
    handleChange () {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
        this.$message.info('请选中三级分类')
      }
    },
    // 切换标签页触发
    beforeTabLeave (activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    // 标签页被选中时触发
    async tabClickd () {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'many' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态列表参数失败')
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'only' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态数据列表失败')
        }
        this.onlyTableData = res.data
      }
    },
    // 放大图片的操作
    handlePreview (file) {
      this.preview = file.response.data.url
      this.preViewVisible = true
    },
    // 删除图片的操作
    handleRemove (file) {
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      this.addForm.pics.splice(i, 1)
    },
    // 图片上传成功的事件
    handleSuccess (resopnse) {
      const picInfo = {
        pic: resopnse.data.tmp_path
      }
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    // 添加商品
    add () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项')
        }
        // 执行添加的业务逻辑
        // lodash cloneDeep(obk)
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)

        // 发起请求 商品名称唯一
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 5px !important;
}
.preViewImg {
  width: 100%;
}
.Addbtn {
  margin-top: 15px;
}
</style>
